I had one of those in my Pod during O week (pod = like flatmates, same wing and floor of the building. 6 of us total).

She was LOVELY at first, had a cute little sister, we hung out a lot. We didn't have a lot in common though, and had very clashing schedules, so I assumed she'd be like any normal person and accept that we could only really hand out on weekends.

She was not a normal person.

Stuff went missing from the shared kitchen. Not just my stuff, mind you. She became super passive-aggressive, started binge drinking and blaming me for not being there to stop her. I dismissed it, more stuff vanished, this time from bedrooms. My lock was broken too. She tried to blame me and get me kicked out. Luckily, we had a fire drill during which she left the door open and a whole load of stolen goods were found - wallets, spoons, underwear. You name it, she stole it. She was there for less than two weeks and has to pay rent for the whole year for breaking the contract.

My university has a LOT of these people, bizzarely. It's largely tennanted by super-sheltered, home-schooled type religious kids who are both used to getting their own way, but are shockingly innocent about the real world. Their inability to make - and keep - friends shocks them just as much as leaving their door open all weekend and getting robbed does.

They offer university-entrance papers which a lot of homeschooling or small-town schools don't have, and most other unis don't offer, which I guess is why they all chose it. Still not fun for the rest of us.